Hi!
I entered dates of patients starting on treatment and date of their
interview under different variables:
startd (for day)
startm (for month)
starty (for year)
surveyd (for day)
surveym (month)
surveyy (year)
Now i want to calculate number of months patients have been on treatment.
I am finding problems in creating
start=startd+startm+starty
survey=surveyd+surveym+surveyy
period=survey-start
Any tips?
Thank you and best regards
ziad
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